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Elasticsearch\Common\Exceptions\NoNodesAvailableException: No alive nodes found in your cluster in Elasticsearch\ConnectionPool\StaticNoPingConnectionPool->nextConnection() (line 64 of /data/www/www.inth.ugent.be/vendor/elasticsearch/elasticsearch/src/Elasticsearch/ConnectionPool/StaticNoPingConnectionPool.php).
Elasticsearch\Transport->getConnection() (Line: 99) Elasticsearch\Transport->performRequest() (Line: 43) Elasticsearch\Namespaces\BooleanRequestWrapper::performRequest() (Line: 400) Elasticsearch\Namespaces\IndicesNamespace->exists() (Line: 614) Drupal\elasticsearch_connector\Plugin\search_api\backend\SearchApiElasticsearchBackend->search() (Line: 473) Drupal\search_api\Entity\Server->search() (Line: 548) Drupal\search_api\Query\Query->execute() (Line: 124) Drupal\sliderwidgetminmax\Plugin\facets\widget\SliderMinMaxWidget->build() (Line: 406) Drupal\facets\FacetManager\DefaultFacetManager->build() (Line: 91) Drupal\facets\Plugin\Block\FacetBlock->build() (Line: 171) Drupal\block\BlockViewBuilder::preRender() call_user_func_array() (Line: 111) Drupal\Core\Render\Renderer->doTrustedCallback() (Line: 859) Drupal\Core\Render\Renderer->doCallback() (Line: 421) Drupal\Core\Render\Renderer->doRender() (Line: 240) Drupal\Core\Render\Renderer->render() (Line: 165) Drupal\Core\Render\Renderer->Drupal\Core\Render\{closure}() (Line: 627) Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 166) Drupal\Core\Render\Renderer->renderPlain() (Line: 183) Drupal\Core\Render\Renderer->doRenderPlaceholder() (Line: 712) Drupal\Core\Render\Renderer->Drupal\Core\Render\{closure}() Fiber->start() (Line: 720) Drupal\Core\Render\Renderer->replacePlaceholders() (Line: 597) Drupal\Core\Render\Renderer->doRender() (Line: 240) Drupal\Core\Render\Renderer->render() (Line: 153) Drupal\Core\Render\Renderer->Drupal\Core\Render\{closure}() (Line: 627) Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 154) Drupal\Core\Render\Renderer->renderRoot() (Line: 286) Drupal\Core\Render\HtmlResponseAttachmentsProcessor->renderPlaceholders() (Line: 135) Drupal\Core\Render\HtmlResponseAttachmentsProcessor->processAttachments() (Line: 45) Drupal\Core\EventSubscriber\HtmlResponseSubscriber->onRespond() call_user_func() (Line: 111) Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch() (Line: 214) Symfony\Component\HttpKernel\HttpKernel->filterResponse() (Line: 202) Symfony\Component\HttpKernel\HttpKernel->handleRaw() (Line: 76) Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 58) Drupal\Core\StackMiddleware\Session->handle() (Line: 48) Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 28) Drupal\Core\StackMiddleware\ContentLength->handle() (Line: 191) Drupal\page_cache\StackMiddleware\PageCache->fetch() (Line: 128) Drupal\page_cache\StackMiddleware\PageCache->lookup() (Line: 82) Drupal\page_cache\StackMiddleware\PageCache->handle() (Line: 48) Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 51) Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 36) Drupal\Core\StackMiddleware\AjaxPageState->handle() (Line: 51) Drupal\Core\StackMiddleware\StackedHttpKernel->handle() (Line: 704) Drupal\Core\DrupalKernel->handle() (Line: 19)